现象 1.水泥地面表面粗糙、光洁度差、颜色发白,不坚硬。2.使用后,随着使用时间的增长,表面先有松散的水泥灰,砂粒逐步松动或有成片的水泥地面剥落。3.地面出现空鼓和不规则的裂纹。原因分析 1.水泥砂浆水灰比过大,降低了砂浆强度,使用后易造成起灰、掉砂。2.工序 Phenomenon 1. The surface of the concrete floor is rough, poor in finish, white in color, and not hard. 2. After use, with the increase in the use of time, loose cement ash is first formed on the surface, and the sand grains loosen gradually or peel off from the concrete floor. 3. Empty and irregular cracks on the ground. Analysis 1. The cement mortar has a large water-cement ratio, which reduces the strength of the mortar and can easily cause ashing and sand loss after use. 2. Process